Ok, I guess I've learned not to comment before the game is ended now.
I really love the music, artwork, the (working!) mechanics and the storyline is intriguing. However, the bugs and glitches that start appearing in the third chapter and show some real nasty habits in the fourth are really annoying and last but not least what took the joy of playing from me was the anti-klimax of the ending due to all the glitches in powers, boss behaviour, etcetera. That sucked big time :/
Reducing rating for now due to glitch in 4th(?) chapter where some game mechanic is missing for me, I can do nothing to finish the level and is stuck within it (as well as suicidal options have been removed). The result was a forced replay of the entire chapter just to realize that the game is broken and I can't continue.
I like the idea of penguins :) Lack a bit when it comes to upgrades, posibilities generally and difficulty level (all parts are really dependant on each other)